Dhammapada · 19.15
Na tena ariyo hoti, yena pāṇāni hiṃsati;Ahiṃsā sabbapāṇānaṃ, ariyoti pavuccati.
Na tena ariyo hoti, yena panani himsati; Ahimsa sabbapananam, ariyoti pavuccati.
One is not a noble one merely by harming living beings. By non-harming of all living beings is one called a noble one.
— Dhammapada 19.15
Source: Pali text from the Khuddaka Nikāya of the Pali Canon (oldest extant Buddhist scripture, compiled c. 3rd century BCE). Public-domain English readings drawn from F. Max Müller's translation in Sacred Books of the East, Vol X (1881) and the Buddhist Publication Society's freely-licensed Acharya Buddharakkhita rendering.